PLearn 0.1
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The first sentence should be a BRIEF DESCRIPTION of what the class does. More...
#include <ReplicateSamplesVMatrix.h>
Public Member Functions | |
ReplicateSamplesVMatrix () | |
Default constructor. | |
virtual string | classname () const |
virtual OptionList & | getOptionList () const |
virtual OptionMap & | getOptionMap () const |
virtual RemoteMethodMap & | getRemoteMethodMap () const |
virtual ReplicateSamplesVMatrix * | deepCopy (CopiesMap &copies) const |
virtual void | build () |
Simply calls inherited::build() then build_(). | |
virtual void | makeDeepCopyFromShallowCopy (CopiesMap &copies) |
Transforms a shallow copy into a deep copy. | |
Static Public Member Functions | |
static string | _classname_ () |
SelectRowsVMatrix. | |
static OptionList & | _getOptionList_ () |
static RemoteMethodMap & | _getRemoteMethodMap_ () |
static Object * | _new_instance_for_typemap_ () |
static bool | _isa_ (const Object *o) |
static void | _static_initialize_ () |
static const PPath & | declaringFile () |
Public Attributes | |
bool | operate_on_bags |
int | bag_index |
int32_t | seed |
bool | replicate_missing_targets |
bool | replicate_negative_targets |
Static Public Attributes | |
static StaticInitializer | _static_initializer_ |
Static Protected Member Functions | |
static void | declareOptions (OptionList &ol) |
Declares the class options. | |
Protected Attributes | |
PP< PRandom > | random_gen |
Private Types | |
typedef SelectRowsVMatrix | inherited |
Private Member Functions | |
void | build_ () |
This does the actual building. |
The first sentence should be a BRIEF DESCRIPTION of what the class does.
Place the rest of the class programmer documentation here. Doxygen supports Javadoc-style comments. See http://www.doxygen.org/manual.html
Definition at line 58 of file ReplicateSamplesVMatrix.h.
typedef SelectRowsVMatrix PLearn::ReplicateSamplesVMatrix::inherited [private] |
Reimplemented from PLearn::SelectRowsVMatrix.
Definition at line 60 of file ReplicateSamplesVMatrix.h.
PLearn::ReplicateSamplesVMatrix::ReplicateSamplesVMatrix | ( | ) |
Default constructor.
Definition at line 65 of file ReplicateSamplesVMatrix.cc.
: operate_on_bags(false), bag_index(-1), seed(1827), replicate_missing_targets(true), replicate_negative_targets(true), random_gen(new PRandom()) {}
string PLearn::ReplicateSamplesVMatrix::_classname_ | ( | ) | [static] |
Reimplemented from PLearn::SelectRowsVMatrix.
Definition at line 60 of file ReplicateSamplesVMatrix.cc.
OptionList & PLearn::ReplicateSamplesVMatrix::_getOptionList_ | ( | ) | [static] |
Reimplemented from PLearn::SelectRowsVMatrix.
Definition at line 60 of file ReplicateSamplesVMatrix.cc.
RemoteMethodMap & PLearn::ReplicateSamplesVMatrix::_getRemoteMethodMap_ | ( | ) | [static] |
Reimplemented from PLearn::SelectRowsVMatrix.
Definition at line 60 of file ReplicateSamplesVMatrix.cc.
Reimplemented from PLearn::SelectRowsVMatrix.
Definition at line 60 of file ReplicateSamplesVMatrix.cc.
Object * PLearn::ReplicateSamplesVMatrix::_new_instance_for_typemap_ | ( | ) | [static] |
Reimplemented from PLearn::SelectRowsVMatrix.
Definition at line 60 of file ReplicateSamplesVMatrix.cc.
StaticInitializer ReplicateSamplesVMatrix::_static_initializer_ & PLearn::ReplicateSamplesVMatrix::_static_initialize_ | ( | ) | [static] |
Reimplemented from PLearn::SelectRowsVMatrix.
Definition at line 60 of file ReplicateSamplesVMatrix.cc.
void PLearn::ReplicateSamplesVMatrix::build | ( | ) | [virtual] |
Simply calls inherited::build() then build_().
Reimplemented from PLearn::SelectRowsVMatrix.
Definition at line 119 of file ReplicateSamplesVMatrix.cc.
References PLearn::SelectRowsVMatrix::build(), and build_().
{ // ### Nothing to add here, simply calls build_ inherited::build(); build_(); }
void PLearn::ReplicateSamplesVMatrix::build_ | ( | ) | [private] |
This does the actual building.
Reimplemented from PLearn::SelectRowsVMatrix.
Definition at line 129 of file ReplicateSamplesVMatrix.cc.
References PLearn::TVec< T >::append(), bag_index, PLearn::SelectRowsVMatrix::build(), c, PLearn::TVec< T >::copy(), PLearn::VMat::getExample(), i, PLearn::SelectRowsVMatrix::indices, PLearn::SelectRowsVMatrix::indices_vmat, PLearn::is_missing(), j, PLearn::VMatrix::length(), PLearn::TVec< T >::length(), PLearn::VMat::length(), operate_on_bags, PLASSERT, PLCHECK_MSG, PLERROR, random_gen, replicate_missing_targets, replicate_negative_targets, PLearn::TVec< T >::resize(), seed, PLearn::SourceVMatrix::source, PLearn::SumOverBagsVariable::TARGET_COLUMN_FIRST, PLearn::VMatrix::targetsize(), PLearn::tostring(), and PLearn::VMatrix::updateMtime().
Referenced by build().
{ if (!source) return; PLCHECK_MSG(operate_on_bags || source->targetsize() >= 1, "In ReplicateSamplesVMatrix::build_ - The source VMat must have a " "targetsize at least 1 when not operating on bags, but its " "targetsize is " + tostring(source->targetsize())); PLCHECK_MSG(!operate_on_bags || source->targetsize() >= 2, "In ReplicateSamplesVMatrix::build_ - The source VMat must have a " "targetsize at least 2 when operating on bags, but its targetsize " "is " + tostring(source->targetsize())); updateMtime(indices_vmat); updateMtime(source); PLASSERT(bag_index < 0 || bag_index < source->targetsize()); // Build the vector of indices. indices.resize(0); Vec input, target; real weight; TVec< TVec<int> > class_indices; // Indices of samples in each class. TVec<int> nan_indices; // Indices of missing class TVec< TVec<int> > negativeclass_indices; map<int, int> bag_sizes; // Map a source index to the size of its bag. int bag_start_idx = -1; int bag_idx = bag_index >= 0 ? bag_index : source->targetsize() - 1; for (int i = 0; i < source->length(); i++) { source->getExample(i, input, target, weight); real c_real = target[0]; int c = int(round(c_real)); if (!is_missing(c_real)) { if (c >= class_indices.length()) { int n_to_add = c - class_indices.length() + 1; for (int j = 0; j < n_to_add; j++) class_indices.append(TVec<int>()); } else if ( -c >= negativeclass_indices.length() ) { int n_to_add = -c - negativeclass_indices.length() + 1; for (int j = 0; j < n_to_add; j++) negativeclass_indices.append(TVec<int>()); } } if (!operate_on_bags || int(round(target[bag_idx])) & SumOverBagsVariable::TARGET_COLUMN_FIRST) { if( is_missing(c_real) ) nan_indices.append(i); else if( c>= 0 ) class_indices[c].append(i); else if( c< 0 ) negativeclass_indices[-c].append(i); else PLERROR("In ReplicateSamplesVMatrix::build_ - Invalid class"); indices.append(i); bag_sizes[i] = 0; bag_start_idx = i; } if (operate_on_bags) bag_sizes[bag_start_idx]++; } if( replicate_missing_targets && nan_indices.length() > 0 ) class_indices.append( nan_indices ); if( replicate_negative_targets && negativeclass_indices.length() > 0 ) for(int c = 0; c < negativeclass_indices.length(); c ++ ) if( negativeclass_indices[c].length() > 0 ) class_indices.append( negativeclass_indices[c] ); int max_n = -1; for (int c = 0; c < class_indices.length(); c++) { if (class_indices[c].length() > max_n) max_n = class_indices[c].length(); if (class_indices[c].isEmpty()) PLERROR("In ReplicateSamplesVMatrix::build_ - Cannot replicate " "samples for class %d since there are zero samples from " "this class", c); } for (int c = 0; c < class_indices.length(); c++) { int n_replicated = max_n - class_indices[c].length(); for (int i = 0; i < n_replicated; i++) { indices.append(class_indices[c][i % class_indices[c].length()]); } } // Shuffle data. random_gen->manual_seed(seed); random_gen->shuffleElements(indices); if (operate_on_bags) { // We now need to convert the list of start indices to the list of all // indices within each bag. TVec<int> start_idx = indices.copy(); indices.resize(0); for (int i = 0; i < start_idx.length(); i++) { int start_i = start_idx[i]; for (int j = 0; j < bag_sizes[start_i]; j++) indices.append(start_i + j); } } // Re-build since indices have changed. inherited::build(); }
string PLearn::ReplicateSamplesVMatrix::classname | ( | ) | const [virtual] |
Reimplemented from PLearn::SelectRowsVMatrix.
Definition at line 60 of file ReplicateSamplesVMatrix.cc.
void PLearn::ReplicateSamplesVMatrix::declareOptions | ( | OptionList & | ol | ) | [static, protected] |
Declares the class options.
Reimplemented from PLearn::SelectRowsVMatrix.
Definition at line 77 of file ReplicateSamplesVMatrix.cc.
References bag_index, PLearn::OptionBase::buildoption, PLearn::declareOption(), PLearn::SelectRowsVMatrix::declareOptions(), operate_on_bags, replicate_missing_targets, replicate_negative_targets, and seed.
{ // ### Declare all of this object's options here. // ### For the "flags" of each option, you should typically specify // ### one of OptionBase::buildoption, OptionBase::learntoption or // ### OptionBase::tuningoption. If you don't provide one of these three, // ### this option will be ignored when loading values from a script. // ### You can also combine flags, for example with OptionBase::nosave: // ### (OptionBase::buildoption | OptionBase::nosave) declareOption(ol, "operate_on_bags", &ReplicateSamplesVMatrix::operate_on_bags, OptionBase::buildoption, "If set to 1, then bags in the source VMat will be taken into\n" "account so as to preserve their integrity. The classes will also be\n" "reweighted so that they have the same number of bags."); declareOption(ol, "bag_index", &ReplicateSamplesVMatrix::bag_index, OptionBase::buildoption, "Index of the target corresponding to the bag information (useful\n" "only when operate_on_bags is True). -1 means the last element."); declareOption(ol, "seed", &ReplicateSamplesVMatrix::seed, OptionBase::buildoption, "Seed for the random number generator (to shuffle data)."); declareOption(ol, "replicate_missing_targets", &ReplicateSamplesVMatrix::replicate_missing_targets, OptionBase::buildoption, "Indication that samples with missing (NaN) targets should be replicated."); declareOption(ol, "replicate_negative_targets", &ReplicateSamplesVMatrix::replicate_negative_targets, OptionBase::buildoption, "Indication that samples with negative targets should be replicated."); // Now call the parent class' declareOptions inherited::declareOptions(ol); }
static const PPath& PLearn::ReplicateSamplesVMatrix::declaringFile | ( | ) | [inline, static] |
Reimplemented from PLearn::SelectRowsVMatrix.
Definition at line 83 of file ReplicateSamplesVMatrix.h.
:
ReplicateSamplesVMatrix * PLearn::ReplicateSamplesVMatrix::deepCopy | ( | CopiesMap & | copies | ) | const [virtual] |
Reimplemented from PLearn::SelectRowsVMatrix.
Definition at line 60 of file ReplicateSamplesVMatrix.cc.
OptionList & PLearn::ReplicateSamplesVMatrix::getOptionList | ( | ) | const [virtual] |
Reimplemented from PLearn::SelectRowsVMatrix.
Definition at line 60 of file ReplicateSamplesVMatrix.cc.
OptionMap & PLearn::ReplicateSamplesVMatrix::getOptionMap | ( | ) | const [virtual] |
Reimplemented from PLearn::SelectRowsVMatrix.
Definition at line 60 of file ReplicateSamplesVMatrix.cc.
RemoteMethodMap & PLearn::ReplicateSamplesVMatrix::getRemoteMethodMap | ( | ) | const [virtual] |
Reimplemented from PLearn::SelectRowsVMatrix.
Definition at line 60 of file ReplicateSamplesVMatrix.cc.
void PLearn::ReplicateSamplesVMatrix::makeDeepCopyFromShallowCopy | ( | CopiesMap & | copies | ) | [virtual] |
Transforms a shallow copy into a deep copy.
Reimplemented from PLearn::SelectRowsVMatrix.
Definition at line 239 of file ReplicateSamplesVMatrix.cc.
References PLearn::deepCopyField(), PLearn::SelectRowsVMatrix::makeDeepCopyFromShallowCopy(), and random_gen.
{ inherited::makeDeepCopyFromShallowCopy(copies); deepCopyField(random_gen, copies); }
Reimplemented from PLearn::SelectRowsVMatrix.
Definition at line 83 of file ReplicateSamplesVMatrix.h.
Definition at line 66 of file ReplicateSamplesVMatrix.h.
Referenced by build_(), and declareOptions().
Definition at line 65 of file ReplicateSamplesVMatrix.h.
Referenced by build_(), and declareOptions().
PP<PRandom> PLearn::ReplicateSamplesVMatrix::random_gen [protected] |
Definition at line 93 of file ReplicateSamplesVMatrix.h.
Referenced by build_(), and makeDeepCopyFromShallowCopy().
Definition at line 68 of file ReplicateSamplesVMatrix.h.
Referenced by build_(), and declareOptions().
Definition at line 69 of file ReplicateSamplesVMatrix.h.
Referenced by build_(), and declareOptions().
Definition at line 67 of file ReplicateSamplesVMatrix.h.
Referenced by build_(), and declareOptions().